<template>
	<view>
    <view class="search-box">
        <uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
    </view>
    
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchResulist.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchResulist" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
       <view class="history-title">
            <text>搜索历史</text>
            <uni-icons type="trash" size="17" @click="clean"></uni-icons>
       </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item, i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
        // 搜索关键词
        kw:'',
        // 搜索的结果列表
        searchResulist:[],
        // 历史记录
        historyList:[]
			};
		},
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods:{
      // 输入事件的处理函数
      input(e){
        
        clearTimeout(this.timer)
        
        this.timer = setTimeout(()=>{
          this.kw=e.value
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        if(this.kw.length===0){
          this.searchResulist = []
          return
        }
        
       const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
       if(res.meta.status !== 200) return uni.$showMsg()
       this.searchResulist = res.message
       
       this.saveSearchHistory()
      },
      gotoDetail(item){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
        })
      },
      // 保存搜索记录
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        // 创建一个对象
        const  set = new Set(this.historyList)
        // 通过对象的方法进行元素处理
        set.delete(this.kw)
        set.add(this.kw)
        // 将对象转为数组
        this.historyList = Array.from(set)
        
        // 持久化的存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      clean(){
        this.historyList=[]
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail'
        })
      }
    },
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    }
	}
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top:0;
  z-index: 999;
}

.sugg-list{
  padding: 0 5px;
  
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 15px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}

.history-box{
    padding: 0 5px;
    .history-title{
      display: flex;
      justify-content: space-between;
      height: 40px;
      align-items: center;
      font-size: 13px;
      border-bottom: 1px solid #efefef;
    }
    
      
    .history-list{
      display: flex;
      flex-wrap: wrap;
      
      .uni-tag{
         margin-top: 5px;
         margin-right: 5px;
      }
    }
}
</style>
